I'm not trying to be a dick, but really, the Walker isn't rocket science. In Layman's terms - You need to whittle it down. When you cripple one of its legs it opens up to reveal it's Big Obvious Weak Spot. You shoot the crap out of that. Do this enough times and the sucker drops. With a very well coordinated (and slightly psychotic) team this can be done in five minutes. Here's some dos and donts - Don't walk up to it, because it'll kill your arse - Don't stay too long in its line of sight or it'll kill your arse - Don't take chances with its cannon and the splash damage from its shots. You see that red laser anywhere near you? Book it, or it'll kill your arse. - If you're on the left side of the map, watch out for the sniper in the tall ruin on the right, on the platform the Walker is standing on. - The way the leg plating falls off is related more to the Walker's overall health rather than the amount of damage. Doesn't matter which leg plating you target, it will pop off when he loses enough health - Be mindful of the reinforcements. - If you're very quick, the lower area immediately in front of the Walker is good for ammo once you've cleared out the reinforcements - Dead team mate? Assess the situation. If you think you can get to him and revive him without dying, go for it. If not, hold out for 30 seconds. - SHOOT THE PLATES. Don't waste your ammo shooting anywhere else. When the weak point shows itself, go for it. - Got heavy weapon ammo? Don't save it for the weak points. You want its weak points to show up ASAP. - Got a super? Don't use it on the walker. You'll damage him, yeah, but you won't be making any orbs of light for more supers, will you? There's lots of reinforcements, use it on them instead! Think that's everything. Ok, beta has less than 24 hours left, go forth and waste that tank bastard.